212 University of California Publications in Zoology. [Vou.% 
the erythro-melanistie state of calurus. The former are plainly 
in the light phase, if indeed, alascensis possesses a true dark 
phase at all. No. 41 is a full-grown juvenal and is a bird-of-the- 
year, because tufts of natal down are still to be observed adher- 
ing to the tips of the rectrices and secondaries. This bird is 
notable for its excessive darkness as compared with the corre- 
sponding plumage of calurus and borealis. The whole dorsal 
surface is black, seantily relieved by narrow cinnamon-rufous 
edgings on the hind neck and seapulars. The feathers of the 
rump and the rectrices are tipped with clay-color. The nine 
black bars across the dorsal surface of the tail are scarcely set 
off by the slightly paler intervals. Beneath, a noticeable distine- 
tive character is the heavy and close barring on the flanks and 
lower tail coverts, the ground color being elay-color. The in- 
creased extent of black markings on the neck, chest and sides of 
belly is also worthy of record. The relatively unmarked chest 
region is suffused with a strong tinge of cinnamon. 
Culmen Bill 
from from 
No. Sex Loeality Date Length Stretch Wing Tail cere nostril 
51 6 ad. Glacier Bay July 19 490 1130 344 195 23.2 21.1 
43 6 (?) ad. Port Frederick July 28 515 1215 362 218 25.5 22.3 
42 9 ad. Port Frederick July 28 ...... .......- 365 207 27 23 
41 Q im. Port Frederick July 28 ...... ........ 368 235 26 23 
The Alaska red-tail was found at several of the points vis- 
ited, but was nowhere remarkable for its abundance. According 
to Dixon’s notebook a pair were evidently nesting near the head 
of Alexander Lake, as they were seen there repeatedly between 
May 19 and June 11. A pair were seen June 13 at the head of 
Kootznahoo Inlet, also on Admiralty Island. Near Coppermine 
Cove, Glacier Bay, a pair were noted and one bird secured. 
At Port Frederick, Chichagof Island, July 28, two adults and 
two fully grown young were detected in the forest through the 
squealing of the latter, and three of the birds secured. The 
stomachs of these birds, according to Dixon, were filled with 
meadow mice (Microtus) ; these rodents, abundant at this place, 
evidently constituted the main ‘food supply of the red-tails. 
At Rodman Bay, Baranof Island, August 12 to 20, Stephens 
saw a red-tail near the summit of the mountain that was climbed, 
and two others were noted on the opposite side of the bay. 
